JP4329628B2 - Concrete joint structure of a pair of steel pipes - Google Patents

Concrete joint structure of a pair of steel pipes Download PDF

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JP4329628B2
JP4329628B2 JP2004175298A JP2004175298A JP4329628B2 JP 4329628 B2 JP4329628 B2 JP 4329628B2 JP 2004175298 A JP2004175298 A JP 2004175298A JP 2004175298 A JP2004175298 A JP 2004175298A JP 4329628 B2 JP4329628 B2 JP 4329628B2
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steel pipes
concrete
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steel pipe
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JP2005351024A (en
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了 大野
敏雄 野村
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Obayashi Corp
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Description

本発明は、橋梁等に適用される一対の鋼管のコンクリート接合構造に関する。   The present invention relates to a concrete joint structure of a pair of steel pipes applied to a bridge or the like.

鋼材を用いたトラス構造では、トラスとなる一対の鋼材を梁に接合して構成され、三角形を単位とした骨組構造を形成する。ここで、一般には、トラスの接合相手部材となる梁は、やはり鋼材であり、溶接により直接接合するか、あるいはガセットプレートやアングルなどを介して溶接又はボルト締めなどによって一体化を図るようになっている。   A truss structure using steel materials is formed by joining a pair of steel materials serving as trusses to a beam to form a frame structure with a triangular unit. Here, in general, the beam which is a member to be joined to the truss is still a steel material, and is joined directly by welding, or is integrated by welding or bolting via a gusset plate or an angle. ing.

一方、鋼管をコンクリート中に定着するには、アンカーとなる部材を介して定着することが必要であり、従来では、鋼管端面にアンカー鉄筋やアンカー鋼棒を取付ける構造や、ガセット構造や鋳鉄などの鋼部材を取付けた上でコンクリートに一体化していた。   On the other hand, in order to fix a steel pipe in concrete, it is necessary to fix it through a member that becomes an anchor. Conventionally, a structure in which an anchor rebar or an anchor steel rod is attached to a steel pipe end face, a gusset structure, cast iron, etc. It was integrated with concrete after the steel member was attached.

従って、鋼管・コンクリートによるトラス構造に適用した場合には、一対の鋼管の定着部分にアンカーとなる部材を固定した状態でコンクリートを打設し、一体化を図らなければならないが、次に述べるような課題があった。   Therefore, when applied to a steel pipe / concrete truss structure, concrete must be placed and integrated with anchoring members fixed to the anchoring parts of a pair of steel pipes. There was a serious problem.

即ち、アンカーとなる部材を溶接、ボルト締めなどにより鋼管端部に取付けておかなければならないため、部品点数が多く、構造が複雑化するため、施工性が悪く、施工期間が長くなり、従って高コストなる。   In other words, since the anchor member must be attached to the end of the steel pipe by welding, bolting, etc., the number of parts is large and the structure is complicated, so that the workability is poor and the construction period is long. Cost.

本発明は、以上の課題を解決するためのものであり、その目的は、部品点数が少なく、施工が簡単で工期短縮できるコンクリート接合構造を提供することである。   The present invention is to solve the above-described problems, and an object of the present invention is to provide a concrete joint structure that has a small number of parts, can be easily constructed, and can shorten the construction period.

本発明の他の目的は、引張り及び圧縮に対して十分な耐力を得ることができるコンクリート接合構造を提供することである。   Another object of the present invention is to provide a concrete joint structure capable of obtaining sufficient strength against tension and compression.

前記目的を達成するため、本発明は、近接配置された一対の鋼管の端部をコンクリートを介在して接合する構造であって、前記一対の鋼管の一方の端部には連結鋼板の一端が接続されており、前記連結鋼板の他端は、前記一対の鋼管の他方の端部に設けられた係合部と係合することにより、前記一対の鋼管は相互に連結されている一対の鋼管のコンクリート接合構造であって、前記連結鋼板の他端は断面T字状であり、前記一対の鋼管の他方は、端部に切欠きが設けられた中空鋼管であり、前記連結鋼板の断面T字状の他端を、前記切欠きに嵌め込むことにより、前記一対の鋼管は相互に連結されていることを特徴とするものである。従って、本発明では、従来に比較して、部品点数が少なく施工が簡単で工期短縮が可能となる。また、部品点数が少ないにも関わらず各鋼管の軸方向に対する引張り及び圧縮に対して十分な耐力を備えた接合構造とすることができる。 In order to achieve the above object, the present invention is a structure in which the ends of a pair of steel pipes arranged close to each other are joined via concrete, and one end of the pair of steel pipes has one end of a connecting steel plate. The pair of steel pipes are connected to each other by engaging the other end of the connecting steel plate with an engaging portion provided at the other end of the pair of steel pipes. The other end of the connecting steel plate is a T-shaped cross section, the other of the pair of steel pipes is a hollow steel pipe provided with a notch at the end, and the cross section T of the connecting steel plate The pair of steel pipes are connected to each other by fitting the other end of the letter shape into the notch . Therefore, according to the present invention, the number of parts is small and the construction is simple and the construction period can be shortened as compared with the prior art. Moreover, it can be set as the joining structure provided with sufficient proof stress with respect to the tension | tensile_strength and compression with respect to the axial direction of each steel pipe, although there are few parts number.

また、前記連結鋼板の他端は断面T字状であり、前記一対の鋼管の他方は、端部に切欠きが設けられた中空鋼管であり、前記連結鋼板の断面T字状の他端を、前記切欠きに嵌め込むことにより、前記一対の鋼管は相互に連結されているので、施工にあたって、各鋼管の位置決めが容易であり、作業効率が向上する。 The other end of the connecting steel plate is a T-shaped cross section, the other of the pair of steel pipe is a hollow steel tube which is provided notch in the end portion, a T-shaped cross-section of the other end of the connecting steel plate , by fitting the cutout, the pair of steel pipes since they are connected to each other, when construction is easily positioned each steel pipe, thereby improving the working efficiency.

また、前記コンクリートに接する前記鋼管の表面にリブが設けられている。これにより、定着効果を高めることができる。   Moreover, the rib is provided in the surface of the said steel pipe which touches the said concrete. Thereby, the fixing effect can be enhanced.

更に、前記鋼管の前記コンクリートに接する部分の外周には、複数の孔が設けられている。これにより定着効果を更に高めることができる。   Further, a plurality of holes are provided on the outer periphery of the portion of the steel pipe that contacts the concrete. Thereby, the fixing effect can be further enhanced.

更に、前記コンクリート内に位置する前記鋼管の端部には、定着用の鍔部が設けられている。これにより定着効果を更に高めることができる。   Furthermore, a fixing collar is provided at the end of the steel pipe located in the concrete. Thereby, the fixing effect can be further enhanced.

以上のような構成により、本発明による一対の鋼管のコンクリート接合構造にあっては、簡単な構造であっても、引張り及び圧縮に対して十分な耐力を得ることができる。また、連結鋼板は、予め鋼管に溶接されているので、部品点数が少なく、従って従来に比べて施工が簡単で工期短縮が可能となる。更に、施工にあたって、各鋼管の位置決めが容易であり、作業効率が向上する。   With the configuration as described above, in the concrete joint structure of a pair of steel pipes according to the present invention, sufficient strength against tension and compression can be obtained even with a simple structure. Further, since the connecting steel plate is welded to the steel pipe in advance, the number of parts is small, and therefore, the construction is simpler and the construction period can be shortened as compared with the prior art. Furthermore, in the construction, the positioning of each steel pipe is easy, and the working efficiency is improved.

以下、本発明の好ましい実施の形態につき、添付図面を参照して詳細に説明する。図1は本発明をトラス組を構成する一対の鋼管(鋼管トラス)に適用した場合を示す。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a case where the present invention is applied to a pair of steel pipes (steel pipe trusses) constituting a truss set.

同図において、橋梁などで用いられるコンクリート版3には、その内部にトラス構造を形成する一対の中空鋼管1−1、1−2の端部が埋込まれている。コンクリート版3における中空鋼管1−1、1−2の埋込位置、つまりトラス節点近傍には、肉厚部3aが設けられており、コンクリートと中空鋼管1との接触領域を広くしている。   In the figure, the ends of a pair of hollow steel pipes 1-1 and 1-2 forming a truss structure are embedded in a concrete plate 3 used in a bridge or the like. A thick portion 3a is provided near the embedding position of the hollow steel pipes 1-1 and 1-2 in the concrete plate 3, that is, in the vicinity of the truss node, and the contact area between the concrete and the hollow steel pipe 1 is widened.

中空鋼管1−1、1−2の先端部の中心は、肉厚部3aを除いたコンクリート版3の厚みの半分の位置まで埋込まれている。この位置は、図で破線で示されている。このようにすることで、より付着性能の高い構造となる。   The centers of the tips of the hollow steel pipes 1-1 and 1-2 are embedded up to a position half the thickness of the concrete plate 3 excluding the thick part 3a. This position is indicated by a broken line in the figure. By doing in this way, it becomes a structure with higher adhesion performance.

また、中空鋼管1−1、1−2の先端側の外周面には、溝が設けられており、この溝によりフランジ状の複数のリブ2が所定ピッチで形成されている。リブ2は、中空鋼管1の外周に打設されるコンクリートに対する良好な付着性能を確保するためのもので、その形成ピッチ、及び中空鋼管1−1、1−2に対する突出量、幅などは適宜設定される。   Moreover, a groove is provided on the outer peripheral surface on the tip side of the hollow steel pipes 1-1 and 1-2, and a plurality of flange-shaped ribs 2 are formed at a predetermined pitch by the groove. The rib 2 is for ensuring good adhesion performance with respect to the concrete cast on the outer periphery of the hollow steel pipe 1, and the formation pitch, the protruding amount with respect to the hollow steel pipes 1-1, 1-2, and the width are appropriately determined. Is set.

従来、これら中空鋼管1−1、1−2のリブ2の外側に、スパイラル筋を設けることがある。このスパイラル筋は、中空鋼管1−1、1−2の周囲に巻き回された螺旋鉄筋であり、コンクリートに対する中空鋼管1−1、1−2の付着性能を高める効果がある。   Conventionally, spiral streaks may be provided outside the ribs 2 of the hollow steel pipes 1-1 and 1-2. This spiral rebar is a helical rebar wound around the hollow steel pipes 1-1 and 1-2, and has an effect of improving the adhesion performance of the hollow steel pipes 1-1 and 1-2 to the concrete.

しかし、ここではスパイラル筋を設けていない。それを補完する目的で、リブ2又は溝に多数の孔9を形成する。この孔は、コンクリートの最大骨材径(粗骨材の最大径)の4/3以上の径を有するように設定される。通常、このような孔9のみでは十分な付着性能を得ることは難しいが、後述の連結鋼板5を設けたことで、スパイラル筋を省略しても十分な付着性能が確保される。   However, no spiral streaks are provided here. In order to complement it, a large number of holes 9 are formed in the rib 2 or the groove. This hole is set to have a diameter of 4/3 or more of the maximum aggregate diameter of concrete (the maximum diameter of coarse aggregate). Usually, it is difficult to obtain sufficient adhesion performance with such holes 9 alone, but by providing the connecting steel plate 5 described later, sufficient adhesion performance is ensured even if spiral streaks are omitted.

また、複合トラス橋に応用する場合、設計荷重時にトラス構造に作用する軸力は、圧縮と引張が一意的に決まる。ここでは、中空鋼管1−1には、主に抜出し力(引張軸力)が作用し、中空鋼管1−2は押込み力(圧縮軸力)が作用するものとする。従って、抜出し力(引張軸力)に耐えるために中空鋼管1−1は、中空鋼管1−2よりも広い面積に亙ってリブ2及び多数の孔9が設けられている。   When applied to a composite truss bridge, compression and tension are uniquely determined as the axial force acting on the truss structure at the time of design load. Here, it is assumed that the extraction force (tensile axial force) mainly acts on the hollow steel pipe 1-1, and the pushing force (compression axial force) acts on the hollow steel pipe 1-2. Therefore, in order to withstand the extraction force (tensile axial force), the hollow steel pipe 1-1 is provided with ribs 2 and a large number of holes 9 over a larger area than the hollow steel pipe 1-2.

更に、中空鋼管1−1 、1−2には、夫々、中空鋼管端部に端部鋼板7を溶接することにより、鍔7aが形成されている。この端部鋼板7は、中空鋼管1−1 、1−2に加わる軸力を、コンクリートで受け止める面積を大きくし強度を向上させる。しかし、常に設けられるものではなく、必要性に応じて、適宜、設置又は省略される。   Furthermore, the flange 7a is formed in the hollow steel pipes 1-1 and 1-2 by welding the edge part steel plate 7 to the hollow steel pipe end part, respectively. This end steel plate 7 increases the area by which the axial force applied to the hollow steel pipes 1-1 and 1-2 is received by the concrete and improves the strength. However, it is not always provided, and is appropriately installed or omitted as needed.

そして、抜出し力(引張軸力)の作用する中空鋼管1−1には、中空鋼管端部に連結鋼板5が溶接されている。この連結鋼板5は、中空鋼管1−1を工事現場へ搬送する前に、その端部に予め溶接しておく。同様に、端部鋼板7も、中空鋼管1−1、1−2を工事現場へ搬送する前に、その端部に予め溶接しておく。従って、工事現場へ搬送する必要部品点数としては、連結鋼板5と端部鋼板7を含めて中空鋼管1−1は1点として計数される。その形状としては、図2に示されているように、中心に円形孔7bのあるリング状であり、中空鋼管1−1、1−2に対して、同心の位置に溶接される。   And the connection steel plate 5 is welded to the hollow steel pipe end part to the hollow steel pipe 1-1 in which extraction force (tensile axial force) acts. This connecting steel plate 5 is welded in advance to its end before the hollow steel pipe 1-1 is transported to the construction site. Similarly, the end steel plate 7 is also welded in advance to its end before the hollow steel pipes 1-1 and 1-2 are transported to the construction site. Therefore, as the number of necessary parts to be conveyed to the construction site, the hollow steel pipe 1-1 including the connecting steel plate 5 and the end steel plate 7 is counted as one point. As shown in FIG. 2, the shape is a ring shape having a circular hole 7b in the center, and is welded to the hollow steel pipes 1-1 and 1-2 at a concentric position.

また、連結鋼板5は、図2に示されているように、断面T字状となっており、中空鋼管1−2に設けられた切欠き部1a及び端部鋼板7の切欠き部7aを有する係合部8に係合するような長さ及び形状を持っている。施工時に、図2に示されているように、中空鋼管1−1、1−2は、互いに連結鋼板5を介して連結される。   Further, as shown in FIG. 2, the connecting steel plate 5 has a T-shaped cross section, and includes a notch portion 1 a provided in the hollow steel pipe 1-2 and a notch portion 7 a of the end steel plate 7. It has such a length and shape as to engage with the engaging portion 8 having it. At the time of construction, as shown in FIG. 2, the hollow steel pipes 1-1 and 1-2 are connected to each other via a connecting steel plate 5.

従って、中空鋼管1−1、1−2本体のリブ加工と、多数の孔9の付着力に加え、この連結鋼板5による相互連結により一体化され、確実な定着を図る構造となっている。また、中空鋼管1−1、1−2同士が連結鋼板5を介して作用軸力を伝達しあい、そのエネルギーを分散することができる。特に、トラス格点部に作用することとなる剪断力に対しての抵抗力を高める効果がある。連結鋼板5は、本発明の特徴であるので、以下、更に詳しく説明する。   Therefore, in addition to the rib processing of the hollow steel pipes 1-1 and 1-2 main body and the adhesive force of a large number of holes 9, it is integrated by mutual connection by this connecting steel plate 5, and has a structure for ensuring fixing. Moreover, the hollow steel pipes 1-1 and 1-2 can transmit the acting axial force through the connecting steel plate 5 to disperse the energy. In particular, there is an effect of increasing the resistance to the shearing force that acts on the truss rating points. Since the connecting steel plate 5 is a feature of the present invention, it will be described in more detail below.

図1に示されているように、連結鋼板5の形状は、左右対称の台形となっており、一端に中空鋼管1−1が溶接され、他端に係止鋼板5aが溶接されている。係止鋼板5aは、中空鋼管1−1、1−2を連結する際に、相手側の中空鋼管1−2に設けられた切欠き部1a及び端部鋼板7の切欠き部7aから軸方向に挿入し、相手側の中空鋼管1−2の内部に位置する。その後、内部がコンクリートで充填されることによって連結され一体化が図られる。従って、中空鋼管1−1、1−2の相互の位置決め作業を容易にする効果がある。   As shown in FIG. 1, the connecting steel plate 5 has a symmetrical trapezoidal shape, with a hollow steel pipe 1-1 welded at one end and a locking steel plate 5a welded at the other end. When connecting the hollow steel pipes 1-1 and 1-2, the locking steel plate 5 a is axially extended from the notch 1 a provided on the counterpart hollow steel pipe 1-2 and the notch 7 a of the end steel plate 7. And located inside the hollow steel pipe 1-2 on the other side. Thereafter, the interior is filled with concrete to be connected and integrated. Therefore, there is an effect of facilitating the mutual positioning work of the hollow steel pipes 1-1 and 1-2.

一般には、連結鋼板5あるいは係止鋼板5aの高さ(図1で上下方向の寸法)が大きい程、その効果も大きいと考えられる。しかし、その高さと効果は、配置の自由度や取り扱いの容易さ等とトレードオフの関係にあり、コンクリートの性質や中空鋼管1−1、1−2のサイズあるいは配置により、適宜設定される。   In general, it is considered that the greater the height of the connecting steel plate 5 or the locking steel plate 5a (the vertical dimension in FIG. 1), the greater the effect. However, the height and effect are in a trade-off relationship with the degree of freedom of arrangement, ease of handling, etc., and are appropriately set according to the properties of the concrete and the size or arrangement of the hollow steel pipes 1-1 and 1-2.

位置決め作業の観点からは、係止鋼板5aは、中空鋼管1−1、1−2を連結する際に、相手側の中空鋼管1−2の内壁に完全に接するように設計しておくことが有利と考えられる。しかし、係止鋼板5aと中空鋼管1−2の内壁の間に、若干の隙間を許す設計とすると、施工時の柔軟性を高める。いずれにせよ、中空鋼管1−2の内部は円筒面なので、平板である係止鋼板5aとの間にコンクリートが入り込み、付着力を高める効果が期待できる。   From the viewpoint of positioning work, the locking steel plate 5a may be designed so as to be completely in contact with the inner wall of the counterpart hollow steel pipe 1-2 when the hollow steel pipes 1-1 and 1-2 are connected. It is considered advantageous. However, if it is designed to allow a slight gap between the locking steel plate 5a and the inner wall of the hollow steel pipe 1-2, flexibility during construction is increased. Anyway, since the inside of the hollow steel pipe 1-2 is a cylindrical surface, the concrete enters between the locking steel plate 5a which is a flat plate, and the effect of increasing the adhesive force can be expected.

連結鋼板5の形状としては、左右対称の台形以外にも、効果的な形状があり得る。これは、強度や定着性能、あるいは加工上の理由等から、最も適切なものが選択される。   As the shape of the connecting steel plate 5, there can be an effective shape other than the symmetrical trapezoid. The most appropriate one is selected for strength, fixing performance, or processing reasons.

また、中空鋼管1−1、1−2を角型鋼管としても、本発明の趣旨を実現する上で問題はない。その場合には、平板である係止鋼板5aと面対面の接触が可能となる。   Moreover, there is no problem in realizing the gist of the present invention even if the hollow steel pipes 1-1 and 1-2 are square steel pipes. In that case, contact between the locking steel plate 5a, which is a flat plate, and surface-to-face is possible.

以上のような構造によって、容易な構造で鋼材量が少なく、構造上の弱点のない鋼管部材とコンクリートの接合構造が実現される。   With the structure as described above, a joining structure of a steel pipe member and concrete with an easy structure, a small amount of steel material, and no structural weak points is realized.

図3は、以上のトラス構造を、鋼トラスウェブPC橋を構成するPC橋ユニットの成型に適用した場合の側面を示す。   FIG. 3 shows a side view when the above truss structure is applied to molding of a PC bridge unit constituting a steel truss web PC bridge.

同図において、PC橋ユニット10は、側面視で上下の車線を左右対称に設けたコンクリート製PC橋天井部11と、PC橋天井部11の下部にあって、これより幅狭のコンクリート製PC橋床部12と、鋼トラスウェブを構成する一断面で4つの中空鋼管1とからなり、型枠支持装置13内で一体に成型される。この中空鋼管1は、上記中空鋼管1−1、1−2と同様に構成されている。   In the figure, a PC bridge unit 10 includes a concrete PC bridge ceiling portion 11 in which upper and lower lanes are symmetrically provided in a side view, and a concrete PC having a narrower width than the concrete PC bridge ceiling portion 11. It consists of a bridge floor 12 and four hollow steel pipes 1 in one section constituting a steel truss web, and is integrally molded in a formwork support device 13. The hollow steel pipe 1 is configured in the same manner as the hollow steel pipes 1-1 and 1-2.

各中空鋼管1の上端は、側面視でPC橋天井部11を形作る型枠内にあって、PC橋天井部11の上下車線部における中央分離帯位置と路側帯位置に互いに下部内側に向けて傾斜するように配置され、下端も同じくPC橋床部12を形作る型枠内に、上記の通りの構造によって配置される。   The upper ends of the hollow steel pipes 1 are in a mold that forms the PC bridge ceiling 11 in a side view, and are directed toward the lower inner side at the center separation band position and the roadside band position in the upper and lower lanes of the PC bridge ceiling 11. It arrange | positions so that it may incline and a lower end is arrange | positioned by the structure as above in the formwork which forms the PC bridge floor part 12 similarly.

また、各中空鋼管1の上下の定着端は完全なトラス構造となっており、上記の通り、連結鋼板を介した結合により所定角度でジグザグ状に連続するよう上下の型枠内に配置される。   Moreover, the upper and lower fixing ends of each hollow steel pipe 1 have a complete truss structure, and as described above, they are arranged in the upper and lower molds so as to be continuous in a zigzag shape at a predetermined angle by coupling via a connecting steel plate. .

また、橋梁は、片持ち張出架設や全支保工架設などその形式に応じた工法によって架設が行われる。そして、各型枠内に必要な配筋を行った後、各型枠内にコンクリートを打設することにより、各中空鋼管1の上下端部がPC橋天井部11及びPC橋床部12に定着され、各部一体化したPC橋ユニット10が完成される。   In addition, the bridge is constructed by a construction method according to the type such as cantilever overhanging or full support construction. And after performing necessary reinforcement in each formwork, by placing concrete in each formwork, the upper and lower ends of each hollow steel pipe 1 become the PC bridge ceiling part 11 and the PC bridge floor part 12. The PC bridge unit 10 which is fixed and integrated with each part is completed.

以上、本発明を実施形態により説明したが、当業者にとっては、本発明が本願中に説明した実施形態に限定されるものではなく、多くの変形例及び実装例が、発明の上記の実施形態に対してなし得ることは明らかである。   As described above, the present invention has been described with reference to the embodiment. However, for those skilled in the art, the present invention is not limited to the embodiment described in the present application, and many variations and implementation examples are described above. It is clear that this can be done.

本発明による一対の中空鋼管のコンクリート接合構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows the concrete junction structure of a pair of hollow steel pipe by this invention. 本発明による一対の中空鋼管のコンクリート接合構造で用いられる中空鋼管と連結鋼板との係合状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the engagement state of the hollow steel pipe and connection steel plate which are used with the concrete joining structure of a pair of hollow steel pipe by this invention. 同接合構造を鋼トラスウェブPC橋を構成するPC橋ユニットの成型に適用した場合を示す部分断面側面図である。It is a fragmentary sectional side view which shows the case where the joining structure is applied to shaping | molding of the PC bridge unit which comprises steel truss web PC bridge.

符号の説明Explanation of symbols

1、1−1、1−2 中空鋼管
1a 切欠き部
2 リブ
3 コンクリート版
3a 肉厚部
5 連結鋼板
5a 係止鋼板
7 端部鋼板
7a 鍔部
7b 円形孔
8 係合部
9 孔
10 PC橋ユニット
11 PC橋天井部
12 PC橋床部
13 型枠支持装置
DESCRIPTION OF SYMBOLS 1, 1-1, 1-2 Hollow steel pipe 1a Notch part 2 Rib 3 Concrete plate 3a Thick part 5 Connection steel plate 5a Locking steel plate 7 End steel plate 7a Girder part 7b Circular hole 8 Engagement part 9 Hole 10 PC bridge Unit 11 PC bridge ceiling 12 PC bridge floor 13 Formwork support device

Claims (4)

近接配置された一対の鋼管の端部をコンクリートを介在して接合する構造であって、前記一対の鋼管の一方の端部には連結鋼板の一端が接続されており、前記連結鋼板の他端は、前記一対の鋼管の他方の端部に設けられた係合部と係合することにより、前記一対の鋼管は相互に連結されている一対の鋼管のコンクリート接合構造であって、
前記連結鋼板の他端は断面T字状であり、前記一対の鋼管の他方は、端部に切欠きが設けられた中空鋼管であり、前記連結鋼板の断面T字状の他端を、前記切欠きに嵌め込むことにより、前記一対の鋼管は相互に連結されていることを特徴とする一対の鋼管のコンクリート接合構造。
A structure in which the ends of a pair of adjacent steel pipes are joined via concrete, and one end of a pair of steel pipes is connected to one end of the pair of steel pipes, and the other end of the connection steel sheets Is a concrete joint structure of a pair of steel pipes that are connected to each other by engaging with an engaging portion provided at the other end of the pair of steel pipes ,
The other end of the connecting steel plate is T-shaped in cross section, the other of the pair of steel pipes is a hollow steel tube provided with a notch at an end, and the other end of the connecting steel plate is T-shaped in cross section. A concrete joint structure of a pair of steel pipes, wherein the pair of steel pipes are connected to each other by being fitted into notches .
前記コンクリートに接する前記鋼管の表面にリブが設けられていることを特徴とする請求項1に記載の一対の鋼管のコンクリート接合構造。 The concrete joint structure of a pair of steel pipes according to claim 1, wherein a rib is provided on a surface of the steel pipe in contact with the concrete. 前記鋼管の前記コンクリートに接する部分の外周には、複数の孔が設けられていることを特徴とする請求項1又は2に記載の一対の鋼管のコンクリート接合構造。 The concrete joint structure of a pair of steel pipes according to claim 1 or 2 , wherein a plurality of holes are provided in an outer periphery of a portion of the steel pipe that contacts the concrete. 前記コンクリート内に位置する前記鋼管の端部には、定着用の鍔部が設けられていることを特徴とする請求項1〜のいずれかに記載の一対の鋼管のコンクリート接合構造。 The concrete joint structure of a pair of steel pipes according to any one of claims 1 to 3 , wherein a fixing flange is provided at an end of the steel pipe located in the concrete.
JP2004175298A 2004-06-14 2004-06-14 Concrete joint structure of a pair of steel pipes Expired - Fee Related JP4329628B2 (en)

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